Accepted for Publication: November 16, 2011.
Published Online: February 6, 2012. doi:10.1001/archpediatrics.2011.1658
Author Contributions: Dr van der Aa (the principal investigator) had full access to all the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis. Study concept and design: van der Aa, Bartels, te Velde, de Geus, and Brug. Acquisition of data: van der Aa, Bartels, and Boomsma. Analysis and interpretation of data: van der Aa, Bartels, te Velde, Boomsma, and de Geus. Drafting of the manuscript: van der Aa, Bartels, and Brug. Critical revision of the manuscript for important intellectual content: van der Aa, Bartels, te Velde, Boomsma, de Geus, and Brug. Statistical analysis: van der Aa, Bartels, and Boomsma. Obtained funding: Bartels, te Velde, and Brug. Administrative, technical, and material support: Bartels and te Velde. Study supervision: Bartels, te Velde, and Brug.
Financial Disclosure: None reported.
Funding/Support: Funding was obtained from the following grants: “Genes and Environment in Obesogenic Behaviour: Exploring the Relative Importance of Environmental and Genetic Factors on Sedentary Behaviour and Sleep Duration During Adolescence—A Study in Adolescent Twins” (World Cancer Research Fund, August 2009); “Twin-Family Database for Behavior Genetics and Genomics Studies” (The Netherlands Organisation for Scientific Research [NWO] grant 480-04-004); “Spinozapremie” (NWO/SPI grant 56-464-14192); “Genetic and Family Influences on Adolescent Psychopathology and Wellness” (NWO grant 463-06-001); and “A Twin-Sibling Study of Adolescent Wellness” (NWO VENI grant 451-04-034 ). Dr Bartels is financially supported by a senior fellowship of the EMGO Institute for Health and Care Research.